Aakre, I.G., Persson, J.R., Lein, H.L. and Eggen, P.-O. 2021. First-year university students’ perception of chemical bonding and bond energy. Nordic Journal of STEM Education. 4, 2 (Jun. 2021), 12-30. DOI:https://doi.org/10.5324/njsteme.v4i2.3300.